Lubricating system.



P. DAIMLER.

LUBBIGATING SYSTEM.

AFM-16mm: FILED snPT. 5, 1912. 19950981 1 Patented Ja11.21,1913.

4 SHEETS- SHEET l,

TP. DAIMLER. LUR'ICATING SYSTEM. -APPLAIOATIOH FILED SEPT. 5, 19.12. 131959,81 l Patented Jan. 21, 1913.

4 SHEETB-SHEBT Z.

P. DAIMLER.

LUBBIGATING TY$TEM APLloATIoN FILED SEPT. s, 1912.

1,501 l ,Patented Ja11.21,1913

4 SHEETS-SHBET 3.

Y @nawak/ Mf- P. DAIMLER. LUBRIGATIHG SYSTEM. APPLIQATION FILED `s1:1 T.5, 1912.

3.1,@5991 l. Patented Jan. 21, 1913.

4 SHEETS-SHEET 4.

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, during the suction ierential diameter .working therein, the

i/AL DAIMLER, F CANNSTATT, GERMANY, SSIGNO'R TO THE FIRM 0F DAIMLER IYGTGRENGESELLSCHAFT, F UNTERTRKHEIM-STUTTGART, GERMANY.

L'UBRICATING SYSTEM.

Specification of Letters Patent.

'Patented dan. 2i, M513.,

Application filed September 5, 1912. Serial No, 718,665.

a dem et ld/vurttemberg, Germany7 have inverted certain new and usetul improveaents in Lubricating' Systems, of which the olloivinpY is a speciiication.

rlhis invention relates to improvements in the lubricating pumps ot' oil circulatory lubrieating systems and the object ot' the present' invention to enable fresh oil to b e supplied by the pump to the oil in the circuit, so that in this manner the quality ot the lubricating' oil will be improvcd.-

According to the present invention the pump comprises a pump cylinder of'difand a similar piston oil being,v drawn into one part of the pump cylinder trom the reservoir in the oil circuit while the other part et the pump cylinder (preferably the smaller part) receives oil from a tresh oil supply. pipe. The oil contained inthe dit- "erent parts of the pump cylinder is forced out on the compression stroke of the piston into common pipe in which the oil from the oil circuit mixes with the fresh oil whereupon it is supplied to the parts to be lubricated.

The supply of oil to the pump tromt-he t'resh oil supply and from the oil circuit 1s controlled by means of a piston valve which simultaneously connects both vparts of the dill'erential cylinder With the oil circuit reservoir and fresh oil supply respectively stroke of the piston'and siinultancously establishes lcommunication between both parts of the cylinderand the common oil delivery pipe during the compression stroke ot' the piston.

As the pump is preferably driven from the motor to be lubricated7 the velocity of the oil circulation and the quantity ot fresh oil supplied by the pump to the oil circuit e"`l vary in proportion to the speed of the ,lttl.

V'n order that the invention may be more f. arly understood, reference is made to the npanyinpv drawingsl whereon L 14g-uros l and 2 shox7 an embodiment of i L invention by way oit example, Fig. l

'ovvs the pump in vertical section on the --B of 2, and Fig, 2A is a horizonsection through the line C-D of Fig. l.

Figs. 3 to 6 are diagrammatic views showing the different positions ot the pump piston and pistoii valve.

In the construction illustrated in Figs. l and 2 it is assumed that the reservoir a for the oil from the oil circuit is situated in the motor casing. The lubricating pump is fitted in this reservoir in such a manner that the oil Will flow into the cylinder of the pump by gravity. pump casing is provided with the openings I) covered With sieves c, so that the oil entering the pump may be freed from dirt therein.

T he pump comprises a differential pump cylinder s s within which Works a (litterential piston z p connected by means of a connecting rod il, to an eccentric f mounted upon a rotatable shaft e'whieh is driven by means of a Worm wheel (l from any suitable source of power, such as the motor to be lubricated. The driving` shaft e. also earries an eccentric g driving a connecting rod o2 connected to a triple piston valve e', 2" 2, the parts yi3 and 2'* intermediate the valve vheads z' i 2 being reduced in thickness.

The piston valve z' c" 2 slides Within a valve casing which is provided with a port :r communicating with the oil chamber w, into which the oil enters from the reservoir o; the port :c is controlled by the piston valve head 2, while t-he port leading from ton valve head z". The smaller' part e of the pump cylinder is controlled by the piston valve head 2; The smaller part s of the pump cylinders is likewise in communication with the valve chamber t through a port l, which is likewise controlled by the piston valve head 2 Which also controls the entrance of fresh oil into the valve cliamlier from a fresh oil supply pipe y through a port y. The piston Valve is also provided vvith a central port yn Which is adapted to periodically connect the bore Z Wit-h the annular space fm, formed between the ref duced part 3 and the valve casing t, this annular space being in communication through a porto Withthe pipe '1' supplying the oil to the parts to ,be lubricated.

The operation of the pump will be more clearly understood by reference to F igs. 3 to 6. inthe position illustrated in Fig. 3 the ditl'erential piston L- p is shown at. the end of its compression stroke, while the piston valve is in its midway position on tlle upstroke, the fresh oil supply pipe y being cut oil" from communication with the a on its suction stroke.

part s 0I" the pump cylinder. The piston valve head z" closes the port 7c and this prevents the entrance of oil from the oil circuit into the part s of the pump cylinder. On the further upward movement of the piston valve, the ports 7c, Z and y are opened so that oil from the reservoir a can enter by way of the port through the port lo into the larger part s of the pump cylinder while fresh oil enters by way of the ports y. and Z into the smaller part s of the pump cylinder, the piston z, p being now Fig. 4 shows the parte in this position with the piston midway of its suction stroke. 0n the piston Zz, p completing its suction stroke, as illustrated in F ig. 5, the piston valve is midway of its return movement, having again cut off connection between the ports Z and y and between the ports 7c and but on the 'further downward movement of the piston valve and the simultaneous compression stroke of the piston z p the piston valve establishes connection by way of the anw nular space m between the port la and the oil delivered by 0 so that the oil taken from the oil circuit into the larger' part s of the pump cylinder will be supplied through the pipe 0 to the parts to be lu.- bricated. Simultaneously the central port u of the piston valve connects the port Z with the annular space m and delivery pipe o, so that the fresh oil within the smaller part s of the pump cylinder will be simultaneously supplied to the delivery pipe o and mix thereinwith the oil from the larger part s of the pump cylinder. Fig. 6 shows this position of the parts. It will be seen that on the piston valve again commenc- 'ing` its upward stroke communication will continue to be established between the ports i@ and 0 and between the ports Z and 0 until voir respectively, and a piston valve -ii'or.

controlling said connect-ions. y

2. In combination with the oil circuit and Y reservoir of oil circulatory lubricating systems, a differential cylinder, a differential piston working therein, a valve chamber, connections from said valve chamber to the parts of said cylinder of dierent diameter, a fresh oil supply to said valve chamber, connections from said valve chamber to said oil circuit and reservoir and a piston valve in said valve Vchamber controlling said connections.

3. In combination with the oil circuit and. reservoir of. oil circulatory lubpicating systems, a differential cylinder, a difieren tial piston working therein, a valve chamber, connections from said valve chamber to the parte of .said cylinder of different diameter, a fresh oil `:supply to said valve chamber, connections from said valve chamber to said oil circuit and reservoir, and a piston valve in said valve chamber oontrolling Said vconnections and having a central port in said valve adapted to periodically establish communication between the smallerl part of said cylinder and said oil circuit. 1

In testimony whereoi3 ax my signature in presence of two witnesses.

PAUL DAMLER.

`t/,Litnesses:

ROBERT MILANO, FRIDA Kleeman. 

